Study of Cingal® and Triamcinolone Hexacetonide for the Relief of Knee Osteoarthritis Pain

To determine the contribution of Triamcinolone Hexacetonide (TH) when combined with sodium hyaluronate for pain relief, both in terms of magnitude and duration, when used as single injection, as compared to a single injection of TH alone in subjects diagnosed with osteoarthritis of the knee. A saline placebo is included within the trial to set the expectation of a return to Baseline pain for the subjects.